气候变化领域集成服务门户(CCPortal): Yield failure of the subducting plate at the Mariana Trench

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DOI	10.1016/j.tecto.2021.228944
	Yield failure of the subducting plate at the Mariana Trench
	Zhang J.; Zhang F.; Lin J.; Yang H.
发表日期	2021
ISSN	00401951
卷号	814
英文摘要	Two tectonic plates converge at subduction zones where the subducting plate bends. Flexural bending of a subducting plate at a trench results in pervasive normal faulting, providing conduits for plate hydration and influencing the water budget and seismic behavior of the plate interface. 2-D plate bending simulations have demonstrated high strains due to strong bending may result in loss of strength of the lithosphere and intraplate earthquakes near the trench axis. However 3-D plate bending deformation may affect the along-strike slab pull force, especially when the deflection changes along the trench. Here we simulated the 3-D plate bending deformation and calculated bending stresses, and brittle failure of the Pacific plate at the Mariana Trench. We find that both the plate deflection and the yield zone depth (~16–20 km) increases from the northern to southern Mariana Trench. The water flux in the plate at the southern Mariana Trench is estimated to be about 15% greater than that of the northern Mariana Trench. By comparing with 2-D models, we further find that the 2-D approaches may undereastimate the yield zone depth as they ignored the along-trench effects of plate deflection. The new results provide a self-consistent framework for interpretation of the observed surface normal faults, extensional earthquakes, and the inferred hydration of the subducting plate as constrained by seismic velocity anomalies. © 2021 Elsevier B.V.
关键词	3-D plate bending Earthquakes Mariana trench Numerical simulation Yield zone depth
英文关键词	Budget control; Earthquakes; Fault slips; Hydration; Intraplate earthquakes; Plate bending deformations; Plate deflections; Plate interfaces; Seismic behavior; Seismic velocities; Subducting plate; Subduction zones; Bending (deformation); bending; depth; failure mechanism; Pacific plate; plate tectonics; seismic velocity; seismic zone; subduction; Mariana Trench; Pacific Ocean
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208112
作者单位	Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad, 45320, Pakistan; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, 518057, China; Earth System Science Program, The Chinese University of Hong Kong, Hong Kong
推荐引用方式 GB/T 7714	Zhang J.,Zhang F.,Lin J.,et al. Yield failure of the subducting plate at the Mariana Trench[J],2021,814.
APA	Zhang J.,Zhang F.,Lin J.,&Yang H..(2021).Yield failure of the subducting plate at the Mariana Trench.Tectonophysics,814.
MLA	Zhang J.,et al."Yield failure of the subducting plate at the Mariana Trench".Tectonophysics 814(2021).